It's Sunday, meaning it's time for the best iPad apps of the week. This week, we're wowing you with an app that will teach you something, and another that will test your knowledge of pop culture.
IBM Think: How did we get from the invention of the wheel to the personal computer? It's been a long road, marked by very important developments along the way. Based on IBM's Think exhibit staged in NYC last year, this app maps innovation in a beautifully-designed package. Free
Trivia Party: You don't have to go out to the bar for a trivia night. You challenge your friends' cultural know-how anytime with this competitive app. No friends? No problem. Fire up solo mode. Free